<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1.0,minimum-scale=1,maximum-scale=1,user-scalable=no,viewport-fit=cover"
    />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>
  <body>
    <!-- <h1>MVC DEMO</h1> -->
    <div class="page">
      <div id="app1" class="app">
        <div class="output">
          <span id="number"></span>
        </div>
        <div class="actions">
          <button id="add1">+1</button>
          <button id="minus1">-1</button>
          <button id="multi2">*2</button>
          <button id="divide2">/2</button>
        </div>
      </div>
      <div id="app2" class="app">
        <ol class="tab_bar">
          <li><span>111</span></li>
          <li>222</li>
        </ol>
        <ol class="tab_con">
          <li>内容111</li>
          <li>内容222</li>
        </ol>
      </div>
      <div id="app3" class="app">
        <div class="square"></div>
      </div>
      <div id="app4" class="app">
        <div class="circle"></div>
      </div>
    </div>
  </body>
  <script src="main.js"></script>
</html>
